Glass-blowing machine.



No. 779,089. PATENTED (IAN. 3, 1905.

R. J. MAIN.

GLASS BLOWNG MACHINE.

APPLICATION FILED JUNE 23.1904.

` 4 SHEETS-SHEET 1.

No. 779,089. l PTENTED JAN. 3, 1905.

II. I. MAIN. GLASS BLOWIIIG MACHINE.

APPLIOATION FILED JUNE 23,1904.

4 SHEETS-SHEET 2.'

IL. MII

; 131g, a. I i 64 i 1 nl n I. 82l 16 80 1 IlIE t 78 I 3 14 I 28- 486I||I o! d4" I 36/ I I I Il,

I I I I No. 779,089, A l PATENTED JAN. 3, l905. R. J. MAIN.

GLASS BLOWING MACHINE.

APPLICATION Hmm JUNE 23.1904. ,5, mms-SHEET s.

me/.am i i Robert J. Mam,

' l; ff Y PATENTBD JAN. 3, 1905.

R. J. MAIN.

GLASS BLOWING MACHINE.

AE'PLIOATION FILED JUNE 23.1904.

4 SHEETS-SHEET 4.

@140cm/ko@ Robert J. Main.

By MM A @Hoz/112W UNTTED STATES Patented January 3, 1905.

ROBERT J. MAIN, F SWAYZEE, INDIANA.

GLASS-BLOWING MACHINE.

SPECI]. `IGA'IIOI\Tv forming part of Letters Patent No. 779,089, datedJanuary 3, 1905.

Application tiled June 2S, 1904. Serial No. 213,853.

To 1,7/ whom, it may concern:

Be. it known that I, ROBERT J. MAIN, a citizen of the United States,residing at Swayzee, in the county of Grant and State of Indiana, haveinvented certain new and useful Im provements in Glass-BlowingIMaChineS,of which the following' is a specification.

In the operation of glass-blowing machines of that type in which thereis a plurality of molds each provided with a primary or pressing bottomand a secondary or blowing' bottom it is desirable that means beprovided for automatically throwing the pressing-bottom into operativeand receiving position and means permitting the withdrawal oi apreceding pressing-bottom from the mold immediately after the pressingaction has taken place and also to providemeans for automaticallyreciprocating the pressing' and blowing heads.

The objects of my invention are to provide a valve arrangement such thatby means of a single lever the operator may cause the automaticoperation of the means for throwing the pressing-bottom to receivingposition and to automatically control the movement of the pressing-headand the blowing-head, the movement ot' the blowing-'head automaticallycontrolling the flow of air therethrough; to provide means by which thepress-mold may be transferred from receiving the pressing position andsupported during the pressing action; to provide means by which theoperator may easily withdraw the press-mold-supporting means at theproper time, and to provide such improvements in details as shall behereinafter pointed out.

In the drawings, Figure 1 is an elevation, in partial section, of myimproved machine. Fig. 2 is an elevation, also in partial section, atabout ninety degrees from Fig. 1. Fig. 3 is a sectional detail of myimproved valve mechanism in normal position; Fig. 4, a similar view withthe parts in position immediately prior to the admission of motive fluidto the presser-head motor and immediately prior to the automatic returnof the valve mechanism for the primary-bottom-operating motors. Fig. 5is a plan beneath the rotating table, and Fig. 6 is a section on line 66 of Fig. 5.

In the drawings, 10 indicates a suitable main frame upon which ismounted a moldcarrying table 11 which turns `in ahorizontal plane andwhich is provided with a plurality ot' mold and bottom receivingportions 12, only one of these being shown in Figs. 1 and 2, as theseportions are of ordinary construction. The usual blow-bottoms are ofcourse used in conjunction with the molds; but as these are of ordinaryconstruction I have purposely omitted them from the drawings in order toavoid confusion. Arranged in each receptacle 12 so as to be reciprocabletherein vertically is a primary or pressing bottom 13, which at itslower end is provided with a depending stem 14. Secured to the mainframe 10 above the table 11 is a vertical stem or other suitablemotor-cylinder 15, provided with a reciprocating piston-rod 16 andsuitable admission and exhaust ports of any desired form. Secured to thelower end of piston-rod 16 is a pressing-head 17 and a moldcap 18, themold-cap being spring-supported upon the presser-head 17 in the usualwelllrnown manner to permit movement of the presser-head after the caphas engaged the mold to close the same. Immediately beneath thepiston-rod 16 and beneath the table 11 is a cylindrical guide 19, havinga vertical slot 19 formed through the wall, to permit passage ot' anystem 14. Mounted in the lower end of guide 19 is a buffer 20, normallyheld up by a spring 21. Buifer 2O has a depending pin 22, which engagesthe bed-plate to prevent the press-mold from hitting the guidering 23,carried by table 11.

Arranged beneath table 11 a distance angularly from guide 19 equal tothe angular distance between two molds on table 11 (or any desiredmultiple of that distance) is a motor-cylinder 24, in which is arrangeda piston and piston-rod 26, which projects upward through the head ofthe cylinder and is adapted to engage a plug 27, which normally lies atthe bottom of a cylindrical guide 28, secured to the upper enol ofcylinder 24.

The guide 28 projects upward a short distance above the to'p of guide 19and has formed in its rear side a vertical slot 28@ which eX- tends downa short distance below the normal IOO position of the upper face of plug27 in order to permit the entrance of any one of the pressmold stems 14.Pivoted to the forward side of -guide 28 is a horizontally-swingingbridgeplate 29, which is adapted to bridgethe space between guide 28 andguide 19, the free end of the bridge-plate lying on top of the guide 19.Bridge 29 is provided witha cam 30, arranged to be engaged by any one ofa series of pins 31, depending from the lower end of each of thelock-yokes 32, carried by table- 11.

Arranged adjacent guide 19 is a lockingplunger 33, which is normallyurged upward by a suitable spring 34. This locking-plunger is adapted toenter one of the lock-yokes 32, and thus hold table 11 in position wherethe press-mold, which lies immediately above guide 19, will be inalinement beneath the pressing-head. Plunger 33 may be depressed bymeans of a suitable foot-lever 35, and this plunger is guided in asuitable bracket 36. Pivoted upon the top of bracket 36 is a latch 37,which is normally urged to the position shown in full lines in Fig. 5 bya light spring 38, and this latch when inthe position shown is adaptedto lie on top of plunger 33, and thus hold it in depressed position.Latch 37 is arranged so as to be engaged by each pin 31 at such timethat the pin will serve to withdraw the latch from plunger 33 to permitit to enter the perforation in the adjacent lockyoke 32 at the propertime. Pivoted to the side of guide 19 isa lever 39, the upper end ofwhich is adapted to engage the -bridgeplate 29 in order that saidbridge-plate may be shifted. The lever 39 carries a pawl 40, having acam-surface 41, adapted to engage a pin 42, projecting from guide 19.Pivoted upon guide 19 (preferably upon the fulcrum of lever 39)is alever 43, the free end of which is arranged to engage the pawl 40, so asto swing lever 39 in a direction to cause the withdrawal of the free endof the bridge-plate 29 from above the guide 19. Plunger 33 carries a pin44, upon which is pivoted an arm or link 45, the free end of which isperforated and adapted to receive a pin 43, forming part of the lever43, the arrangement being such that a depression of the locking-plunger33 will cause a movement of lever 43. The parts just described areomitted from Figs. 1 and 2 for the sake of clearness. In order totemporarily hold the plug 27 with its upper end flush with the upper endof g'uide 28 and the upper face ofbridge 29, the said plug is providedwith a slight shoulder 27', Fig. 1, and mounted near the upper end ofguide 28 is a latch 46, adapted to engage shoulder 27 The latch 46 isnormally urged inward by a light spring 47, and the outer end of thelatch is connected to lever 48, the upper end of which is arranged inposition to be engaged by any one of a series of lugs 49, carried byring 23 of table 11, so that after mold-stem 14 has passed over upon thebridge-plate 29 the lug 49 will engage lever 48 and withdraw latch 46,so as to permit plug 27 to drop to its normal position.

Leading into the bottom of cylinder 24 is an admission and exhaust port50, and leading therefrom is a pipe 51, which leads upward to thevalve-casing 52. This valve-casing is provided with an admission-chamber53, into which leads a suitable supply-pipe 54. It is also provided witha discharge-chamber 55, from which the pipe 51 leads. Arranged betweenchambers 53 and 55 is a valve-seat 56, in which the valve 57 is adaptedto seat. Valve 57 is normally urged to its seat by a suitable spring 58and is provided with a stem the end 59 of which projects from one end ofcasing 52 to form an operating member for the valve, while the end 60projects through the head 61 of the casing 52. Head 61 is provided withan exhaust-port 62, which leads from chamber 55 to the interior of thehead and is arranged to register when Valve 56 is seated with the innerend of the exhaust-passage 63 formed in stem 60.

The passage of motive fluid into and out of the opposite ends ofcylinder 15 is controlled by a suitable valve structure 64 of anydesired type, the valve-stem 65 of Awhich has attached to it theoperating-lever 66. This lever is provided with a segmental slot 67,which at its forward end terminatesin an outwardly-extending portion 67thus forming a shoulder 67H between the two ends of the slot.

Pivoted to the outer end of valve-stem 59 is a link 68, which at itsfree end is provided with a pin 69, which fits in the slot 67. Arrangedangularly from the presser-head a distance equal to the distance betweentwo molds is a blowing-head 70, which is adapted to be brought down uponthe top of a mold containing the pressed glass. The blowing-head 7 O isloosely held upon the lower ball-shaped end of a stem 71, which isvertically reciprocable through a packing-gland 72, carried at the lowerend of a cylinder 73. Secured to the stem within the cylinder is apiston 74, provided with a small perforation 75, which thus forms acommunication between the two ends of the cylinder. Stem 71 continuesupward beyond the piston through a second packinggland 76 and isnormally urged upward by a spring 77. Leadinginto the upper end ofcylinder 73 is an air-supply pipe 78. The stem 71 is provided with alongitudinal passage 79, which 4registers with the central perforationof the blowing-head at its lower end and at its upper end extendstransversely through the stem immediately below the piston 74. Pipe 78leads from a valve-cylinder 80, within which is mounted a piston-valve81, arranged to open and close the port at the inner end of the pipe 78.Leading into cylinder 8O is a IOO IIO

suitable supply-pipe 82. Valve 81 is connected by a suitable lever 83and link 84 with the operating-lever 66.

The operation is as follows: Turning to Fig. 1 and supposing thepress-mold shown in section to contain a requisite quantity of glass,the parts are in normal position,`all but one of the external moldshaving been stripped from the table for the sake of clearness. Theoperator thereupon grasps lever 66 and draws the same toward him. Thefirst movement of the lever acts through link 68 and stem 59 to openvalve 56, at the same time drawing the exhaust-port 63 out of registerwith-port 62. Air immediately enters pipe 51 and from thence passes tothe lower end of cylinder 24, whereupon the piston rises and through thepiston-rod 26 throws plug 27 up to the top of guide 28, where it is heldin position by the catch 46. This movement of plug 27 throws apress-mold up into receiving position and bringsthe lower end of itsstem 14 iiush with the top of guide 28 and bridgeplate 29. At the sametime piston-valve 81 is moved so as to open communication to pipe 78,and thus permit air to pass into cylinder 73, thus forcing piston 74downand bringing the blow-head on top of a mold in which glass has beenpreviously pressed. As soon as air enters the upper end of cylinder 73it of course begins to pass through the perforation 7 5 and passage 79;but this does noty materially affect the glass until the head 7 O comesdown into close contact with the top of the mold; but as soon as thisoccurs a suiiicient amount of air passes through the passages 77 and 79to expand the glass into the mold. Continued movement of lever 66 bringsit into the position shown in dotted lilies in Fig. 4, whereupon pin 69slips by shoulder 67 and spring 58 acts to close the valve 56, whereuponthe pressure in the lower end of cylinder 24 exhausts through pipe 51and passages 62 and 63, thus permitting the return of piston 25 andpiston-rod 26 by their own weight. The plug 27, however, is held up bythe catch 46, and thus continues to support the press mold which hasjust been raised. Further movement of lever 66 opens the valve carriedby stem 65 and admits steam or other motive fluid into the upper end ofcylinder 15, which causes the downward movement of the presser-head, thepressure on the glass being sustained by the bridgeplate 29. When lever66 is returned to its normal position, motive Huid is admitted to thevlower end of cylinder 15, the presser-head is drawn upward, and at theend of the return stroke of the lever 66 valve 81 is brought to normalposition, so as to cut off the supply of air and the blow-head is raisedto normal position by spring 77. rlhereupon the operator steps uponfoot-lever 35, thus drawing the locking-plunger 33 downward out ofengagement with the lock-yoke 32 and freeing the table, so

that it can be turned by the operator. During the depression of thelocking-plunger 33 said plunger operates upon lever 43 to engage pawl 41and swing lever 39 so as to withdraw the bridge-plate 29 from beneaththe lower end of the stem 14 of the mold in which glass has justv beenpressed, thus permitting this press-mold to drop by its own weight, theforce of the weight being taken by buffer 2O and spring 21 and the pin22 preventing the mold from striking ring 23, and thus preventing anyjar which would result in a crackling of the freshly formed glass. Theoperator then turns the table 11 so as to swing the stem 14 of therecently-dropped press-mold out of guide 19 through slot 19l and swingthe stem of the second following press-mold into guide 28 through theslot 28'. Before the stem of this second mold reaches the guide 28,however, one of the lugs 49 has been brought into engagement with lever48, so as to with- -draw catch 46 to permit the plug 27 to drop to itsnormal position, so that the oncoming stem 14 may be swung on top of theplug. The stem 14 of the freshly-filled press-mold slides oii' of plug27 to the top of guide 28 and from thence to bridge-plate 29, pin 31 ofthe table engaging the cam 30 of the bridgeplate and swinging thebridge-plate over on top of guide 19, so that the mold is supported bythe bridge-plate over the open end of guide 19 at the time when pin 31engages latch 37 and swings it enough to permit locking-plunger 33 tomove upward and engage the table to hold it in proper alinement with thepress and blowing heads.

It will be seen from the above that the upward movement of thepress-molds in succession, the pressing action, and the blowing actionare all accurately controlled by the single lever 66, while the operatorcontrols the withdrawal of the press-mold which has just been used bymeans of foot-lever. lt will also be noticed that if for any reasonthere should be a failure of upward movement of the piston 25 theoperator may swing lever 66 back to normal and again catch the valve 56before there is any movement of the presser-head.

l claim as my invention- 1. In a glass-machine, the combination, withthe main frame, of a horizontal]y-rotatable table mounted thereon, aplurality of pressmolds carried by said table and each having adepending stem, a pressing-head arranged above said table,press-mold-elevating mechanism arranged beneath said table behind thepressing-head, and a bridge-plate arranged beneath the table andextending from the pressmold-elevating mechanism to a point beneath thepressing-head.

2. In a glass-machine, the combination, with the main frame, of ahorizontally-rotatable table mounted thereon, a plurality of press- IOOmolds carried by said table and each having n a depending stem, apressing-head arranged above said table, press-mold-elevating mechanismarranged beneath said table behind the pressing-head, a bridge-platearranged beneath the table and extending from the pressmold-elevatingmechanism to a point beneath the pressing-head, and means forwithdrawing the bridge-plate from beneath the press-mold stem.

3. In a glass-machine, the combination, with the main frame, ahoriZontally-rotatable table, a plurality oi press-molds carried by saidtable and each havingadependingstem, and a pressing-head arranged abovethe table; of a vertical guide arranged beneath said table in advance ofthe pressing position, .said guide having an open side into which thedepending stems of the press-molds may pass, a stem-'engaging meansarranged in said guide, means for elevating said engaging means, meansfor holding said engaging means at the upper end of the guide, and abridge-plate arranged beneath the table and extending from said guide toa point beneath the pressing-head, for the purpose set forth.

4. In aglass-machine, the combination, with the main frame,ahorizontally-rotatable table, a plurality of press-molds carried bysaid table and each having a depending stem, and the pressing-headarranged above the table; oi' a vertical guide arranged beneath saidtable behind the pressing position, said guide having an open` side intowhich the depending stems of the press-molds may pass, stem-engagingmeans arranged in said guide, means for elevating said engaging means,means for holding said engaging means at the upper end of the guide, abridge-plate arranged beneath the table and extending from said guide toa point beneath the pressing-head, and means for withdrawing thebridge-plate from beneath the press-mold stem, for the purpose setforth.

5. In a glass-m achine, the combination, with the main frame,ahoriZontally-rotatable moldtable carried thereon, and a plurality ofmolds carried by said table, said molds consisting in part of avertically-movable press-mold each having a depending stem; of apressing-head arranged above said table, a press-mold-elevatingmechanism arranged beneath the table back of the pressing-head adistance equal to the distance between the molds of the moldtable,blowing mechanism arranged above the table in advance of thepressing-head, means for operating the pressing-head, means foroperating the blowing mechanism, a single handlever,` and intermediateconnections between said hand-lever and the pressing mechanism, and theblowing mechanism, and the elevating mechanism, whereby the operation ofsaid lever will cause the operation of said several parts.

6. Inaglass-machine, the combination, with the main frame, thehorizontally-rotatable table carried thereby, a plurality of moldscarried by said table, each of said molds consisting in part of avertically movable pressmold, and a pressing-head arranged above thetable; of a fluid-pressure motor arranged beneath the table back of thepressing mechanism a distance equal to the distance between the moldsand adapted to engage the pressmolds and elevate the same, abridge-plate extending from the -elevating mechanism to a point beneaththe pressing-head, a fluid-pressure motor for operating thepressing-head, a blow-head arranged in advance of the pressing-head adistance equal to the distance between the molds of the mold-table, afluidpressure motor for raising and lowering said blow-head, a valvecontrolling the flow of motive fluid to the elevating-motor, a valve forcontrolling the iiow of motive Huid to the presser-head motor, a valvecontrolling the passage of motive fluid to the blow-head and its motor,a single hand-lever, and intermediate connections between said lever andeach of the valves, for the purpose set forth.

7. In a glass-machine, the combination, with the horizontally-rotatablemold-table and the plurality of molds carried thereby, each of saidmolds consisting in part of the verticallymovable press-mold having adepending stem, of a guide arranged beneath 'said table back ofthepressing position and into which the stems of the press-molds may pass,a plug arranged in said guide normally below the lower end of thepress-mold stems, a Huid-pressure motor arranged beneath said guide andadapted to engage said plug to raise the press-molds, a bridge-plateextending from the upper position of the plug to the pressing position,a catch for holding said plug in its upper position, means forcontrolling the movement of the Huid-pressure motor, and means forwithdrawing said catch.

8. In a glass-machine, the combination, with the horizontally-rotatablemold-table and the plurality of molds carried thereby, each of saidmolds consisting in part oi' the verticallymovable press-mold having adepending stem, of a guide arranged beneath said table back of thepressing position and into which the stems of the press-molds may pass,a plug arranged in said guide normally below the lower end of thepress-mold stems, a Huid-pressure motor arranged beneath said guide andadapted to engage said plug to raise the stems, a bridge-plate extendingfrom the upper position of the plug' to the pressing position, a catchfor holding' said plug in it: Lipper position, means for controlling themovement of the fluid-pressure motor, means for withdrawing said catch,and means for withdrawing the bridge plate from beneath the pressmolds.

9. In a glass-machine, the combination, with the horiZontally-rotatabletable and the molds carried'thereby each consisting in part of avertically-movable press-mold having a de- IOC IOE

Iii

pending stem; of a horizontally swinging bridge plate arranged beneathsaid table, means for elevating the press-mold stems in succession tothe bridge-plate, a looking-plunger adapted to engage the table, a leveradapted to engage the bridge-plate to swing the same, a pawl carried bysaid lever, an operating-lever adapted to engage said pawl, connectionsbetween the looking-plunger and said last-mentioned lever, and meansengaging the pawl and swinging it out of engagement with saidlast-mentioned lever, whereby the locking-plunger may have a movement inexcess of that required to produce the required swinging of thebridge-plate.

l0. In a glass-machine, the combination, with a fluid-pressure motorformingpart thereof, of a valve structure consisting of a main easingprovided with an inlet and outlet Chambers separated by a valve-seat andmain valve, a discharge-valve connected with said valve andcommunicating with the outlet-chamber, a passage leading from theoutlet-chamber to the fluid-pressure motor, means for normally I holdingthe main valve closed, an' operatinglever, and intermediate connectionsbetween said lever and said valve for operating the valve through ashort portion of the movement of said lever and-then releasing the same.

ll. In a glass-machine, the combination, with a {luid-pressuremotorforming part thereof, of a valve structure consisting of a maineasing provided with an inlet-and outlet chambers separated by avalve-seat and main valve, a discharge-valve connected with said valveand Communicating with the outlet-chamber, a passage leading from theoutlet-chamber for the fluid-pressure motor, means for normally holdingthe main valve closed, an operatinglever having a slot formed thereinwith a shoulder 67, a' link carried by the valve, and a pin Carried bysaid link and projecting into said slot, for the purpose set forth.

In witness whereof I have hereunto set my hand and seal, at Swayzee,Indiana, this 20th day of June, A. I). 1904.

ROBERT J. MAIN. L. s]

Witnesses:

JAMES G. MAIN, JEssIE MAIN.

